short circuit Hotpoint LSTB400 UK

My tablet dispenser stopped working. I ordered spare but upon dismantling door found the wires had pulled out of the dispenser unit( look too short to me). There’s a weird little white connection block that the wires are pushed into ( bit like in a phone socket) . Anyway pushed wires back in and the dishwasher worked ok. Then they popped out again and this time I messed up ( idiot) and managed to short them out on the door casing. Tripped house wiring. Have put back together, changed 13 amp fuse however unit is now dead. Before I buy a replacement DW is there an internal fuse / quick fix I can try? I assume parts will be third to half cost of new one.